FAQ has now been updated.
To answer your question, we'd use Unreal's voice menu system. Hit the V key and you have options for order, taunts, etc, and then to keep 1 person from ordering all the bots around, I imagine that we'd have it so you have to be aiming in the general direction of the bot to order it around the first time, then it would be "attached" to you and you wouldn't have to face it to give orders. It would run off if you were idle for a certain amount of time.
That is, that's how I imagine we'd do it, we haven't gotten around to customizing the AI yet. That comes later.